利用非线性变换改进同心各向同性涂层分割的球形隐身
Spherical cloaking using nonlinear transformations for improved segmentation into concentric isotropic coatings
摘要：
研究了两类基于非线性变换的新型球形隐身衣。将基于非线性变换的球形隐身衣分割成同心各向同性的均匀涂层，给出了其隐身特性。最佳离散化的详细研究（例如，各层的厚度控制、非线性因素等）提出了线性和非线性球形隐身衣的隐身模型，并讨论了它们对隐身性能的影响。通过数值模拟近场电场分布和远场雷达截面（RCS），验证了隐身特性和最优分割的选择。
英文摘要：
Two novel classes of spherical invisibility cloaks based on nonlinear transformation have been studied. The cloaking characteristics are presented by segmenting the nonlinear transformation based spherical cloak into concentric isotropic homogeneous coatings. Detailed investigations of the optimal discretization (e.g., thickness control of each layer, nonlinear factor, etc.) are presented for both linear and nonlinear spherical cloaks and their effects on invisibility performance are also discussed. The cloaking properties and our choice of optimal segmentation are verified by the numerical simulation of not only near-field electric-field distribution but also the far-field radar cross section (RCS).
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